I have an excel spreadsheet which could contain hundreds of rows with hours,
minutes and seconds. I need to calculate into hours, minutes seconds the
total duration. I have completed a SUM and changed the calculation total to
HH:MM:SS to stop the 24 hour roll up, however, my total only shows 00:00:00.

Any suggestions?? Thanks

Below is a shortened example ex
01:04:07
00:00:27
00:10:39
00:00:28
00:07:59
00:00:01
00:01:18
00:28:33

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Linda Le geyt